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First observation of the decay \(\bar{B}^0_s \to D^0 K^{0}\) and a measurement of the ratio of branching fractions \(\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{0})}{{\cal B}(\bar{B}^0 \to D^0 \rho^0)}\)

The first observation of the decay \(\bar{B}^0_s \to D^0 K^{*0}\) using \(pp\) data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb\(^{-1}\), is reported. A signal of \(34.4 \pm 6.8\) events is obtained and the absence of signal...

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Published in:arXiv.org 2011-11
Main Authors: Alves, A A, Amhis, Y, Appleby, R B, Arrabito, L, Artuso, M, Barlow, R J, Bauer, Th, Belous, K, Ben-Haim, E, Benton, J, M van Beuzekom, Blouw, J, Blusk, S, Borgia, A, Bowcock, T J V, Brambach, T, Britsch, M, Ciba, K, Collins, P, Constantin, F, Dickens, J, Dzhelyadin, R, D van Eijk, Eisenhardt, S, Eklund, L, Estéve, L, Falabella, A, Filippov, S, Gao, Y, Gersabeck, M, Gershon, T, Ghez, Ph, Graugés, E, Gui, B, Gushchin, E, Hicks, E, Hofmann, W, Hulsbergen, W, Hutchcroft, D, Ketel, T, Khanji, B, Kim, Y M, Kozlinskiy, A, Kreps, M, Krokovny, P, Kruzelecki, K, Kucharczyk, M, Lai, A, Lesiak, T, L Li Gioi, Liu, G, Magnin, J, Malde, S, Manca, G, Martin, L, M -N Minard, Mountain, R, Muresan, R, Mylroie-Smith, J, Naik, P, Nakada, T, Nedos, M, Nomerotski, A, Ogilvy, S, Orlandea, M, Otalora Goicochea, J M, E Perez Trigo, Petrolini, A, Olloqui, E Picatoste, Rademacker, J H, Rakotomiaramanana, B, Raven, G, Rosello, M, Rouvinet, J, Ruf, T, Salzmann, C, Sapunov, M, Sciubba, A, Semennikov, A, Shears, T, Shevchenko, O, Shevchenko, V, R Silva Coutinho, Smith, A C, Stagni, F, Steinkamp, O, Szumlak, T, Teodorescu, E, Teubert, F, Topp-Joergensen, S, Tuning, N, Vagnoni, V, Velthuis, J J, Vilasis-Cardona, X, Visniakov, J, Voss, H, Wilkinson, G, Yang, Z, Zavertyaev, M, Zhang, L
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Language:English
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Summary:The first observation of the decay \(\bar{B}^0_s \to D^0 K^{*0}\) using \(pp\) data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb\(^{-1}\), is reported. A signal of \(34.4 \pm 6.8\) events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The \(\bar{B}^0_s \to D^0 K^{*0}\) branching fraction is measured relative to that of \(\bar{B}^0 \to D^0 \rho^0\): \(\frac{{\cal B}(\bar{B}^0_s \to D^0 K^{*0})}{{\cal B}(\bar{B}^0 \to D^0 \rho^0)} = 1.48 \pm 0.34 \pm 0.15 \pm 0.12\), where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the \(B^0\) and \(B^0_s\) hadronisation fractions.
ISSN:2331-8422
DOI:10.48550/arxiv.1110.3676